Explanation:
Given the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion. ... This supported the idea of oxygen as a key trigger for the evolutionary explosion.
Low-order products are products that are repeatedly purchased and are low-priced while Middle-order products are time-to-time items that are purchased but not as often as low-order products. Also, High-order products are the most expensive items or have a limited market and are scarcely purchased.
Answer:
Birb fly
Explanation:
When wind speed is big, birb flap wind and take off. When birb is in sky it gets tailwind and high speed boost, this turbo gives the reason how bird fly in high wind speed.
Answer:
it show us the anual precipitation per month for the whole year